NCS000332 DMR SW (2)

°Pt HEXION' Hexion Inc.
114 Industrial Boulevard
Morganton, NC 28655
April 29, 2016 VIA CERTIFIED MAIL
NC Division of Water Resources
Attn. DWR Central Files RECEIVED
1617 Mail Service Center
Raleigh, NC 27699-1617 MAY 2 5 2016
CENTRAL FILES
DWR SECTION
SUBJECT- Hexion Inc. — Morganton, NC
NPDES Stormwater PermitC$C1:0033
Semi-Annual Discharge Monitoring Report
Report Period: October 1, 2015 — March 30, 2016
To Whom It May Concern:
Please find enclosed the Discharge Monitoring Report for the report period October 1, 2015 —
March 31, 2016 for the above referenced facility. The facility stormwater outfall was sampled
on March 28, 2016 and laboratory results were received on April 14, 2016
As a result of a benchmark exceedance for Chemical Oxygen Demand, we are now
implementing the "Tier One" corrective actions. The results of such corrective actions will be
documented within our Storm Water Pollution Prevent Plan
Please contact Mr Randy Waibel or myself at 828-584-3800 if you have questions or need
additional information.
Sincerely,
HEXION INC.
6" ail)
Jeff McDaniel
Site Leader
Attachment Stormwater Discharge Monitoring Report (Form SWU-246)

STORMWATER DISCHARGE OUTFALL(SDO)
MONITORING REPORT
Permit Number: NCS 000332 or SAMPLES COLLECTED DURING CALENDAR YEAR: 2016
Certificate of Coverage Number: NCG (This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
FACILITY NAME Hexion Inc. COUNTY Burke
PERSON COLLECTING SAMPLE(S)Randy Waibel PHONE NO. [phone]
CERTIFIED LABORATORY(S)Pace Analytical Service,Inc. Lab#40
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Part A: Specific Monitoring Requirements
50050
Chemical
Outfall Date Sample Total Total Oxygen Ammonia Formaldehyde pH
No. Collected Flow(if app.) Rainfall Demand Nitrogen
(COD)
001 03/28/16 N/A 0.5 inches 166 mg/I 0.55 mg/1 0.131 mg/I 7.23
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_yes X no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall Date 1 50050 00556 _00530 00400
No. Sample Total Flow Total Rainfall Oil&Grease Non-polar Total pH New Motor Oil
Collected (if applicable) (if appl.) O&G/TPH Suspended Usage
(Method 1664 Solids
SGT-HEM),if
_ appl.
mo/dd/yr MG inches mg/1 mg/I Units gal/mo
N/A
Form SWU-246, last revised 2/2/2012
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. \,.
STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 03/28/2016 Attn: Central Files
Total Event Precipitation(inches): 0.5 1617 Mail Service Center
Event Duration (hours): N/A (only if applicable—see permit.) Raleigh,North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation(inches):
Event Duration(hours): (only if applicable—see permit.)
"I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best
of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
C
aktig
Jeff M 4 ill,Site Leader,Hexion Inc. Date
Form SWU-246,last revised 2/2/2012
Page 2 of 2